Re: Glow plug modification

In article <doj6di$5nk@xxxxxxxxxxxxxxxxxxxxxxxx>,
nicksanspam@xxxxxxxxxxxxxxxxx (nicksanspam@xxxxxxxxxxxxxxxxx) says...
> How long do old-fashioned glow plugs last? I don't know when they last
> worked in our old Allis Chalmers 5150 tractor, but I just bought a new
> one for $96.40, and it looks fragile, with a 1/2" coil of wire inside
> a metal sleeve.
>
> It seems to have 1/2" pipe threads, with no taper. We plan to drill and
> tap a 1/2" galvanized pipe cap and screw a $21 Ford pickup glow plug
> (a solid rod, about 1/4" diameter x 2" long) into the cap and screw
> the cap onto a close nipple and screw that into the original glow plug
> hole. What kind of filler can we put in the nipple to avoid making extra
> cylinder volume and reducing compression? A stack of washers around but
> not touching the new rod with a weld to keep them from falling down?

You're on your own with this one, Nick. Let us know how it works out.

As a comment, the 5150 has probably lost enough compression that a glow
plug won't hurt anything. Just don't ding the piston. I would also
probably forget the galvanized mild steel and use a better quality of
steel in the pipe. Bare metal would be fine.

We have a block heater on my dad's AC 175. We never use the glow plugs.
I don't know if they work, and don't much care.

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